The present invention relates to a multistage cultivator for a vegetable garden comprising: a pair of supports which are in the shapes of columns with supports installed on the lower end portions in one direction a plurality of cultivation containers which are in the shapes of triangular prisms and have open upper sides, planting spaces formed therein, water through-holes formed on end portions in one direction of the planting spaces, and joining holes formed on both lateral sides a plurality of joining parts which are joined to the joining holes formed on the cultivation containers and installs and fixes the cultivation containers to the supports in a multistage manner and a water storage tank which is located above the cultivation containers and supplies water to the cultivation containers in a gravity-fed system. According to the present invention, the multistage cultivator for a vegetable garden enables the cultivation containers to be stacked on multiple stages and thus enables a user to utilize a narrow space as much as possible. The multistage cultivator for a vegetable garden enables the user to harvest a large amount of vegetables or flowers by cultivating the vegetables and the flowers in an easy manner without interruption of a type, a size, and a growing condition. The multistage cultivator for a vegetable garden does not interrupt the growth of plants. The multistage cultivator for a vegetable garden has a simple structure and thus can be assembled and disassembled in an easy manner. As the multistage cultivator for a vegetable garden is not an integrated type but an assembled type and thus can be disassembled. Therefore, the multistage cultivator for a vegetable garden can be moved and stored in an easy manner. In addition, the size of the vegetable garden can be adjusted according to the assembly. The multistage cultivator for a vegetable garden collects water discharged from the vegetable garden, discharges the water directly through a drainage hole,
